223 lines
5.5 KiB
C
223 lines
5.5 KiB
C
/*-
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* Copyright (c) 2015 Carsten Larsen
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* Copyright (c) 2014 Poul-Henning Kamp
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Operational Context STDIO
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* =========================
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*
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* "The most effective debugging tool is still careful thought,
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* coupled with judiciously placed print statements."
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* -- Brian Kernighan, "Unix for Beginners" (1979)
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*
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* The problem with print statements is where they end up. For instance
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* in a server with a CLI interface, you want the print statements to go
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* to the CLI session which called the code.
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*
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* An "Operational Context" is a back-pointer to where the print statement
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* should end up.
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*
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* We operate with three "channels", DIAG, TRACE and DEBUG.
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*
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* DIAG is mandatory output, error messages, diagnostics etc.
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* This should always end up where the action was initiated.
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*
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* DEBUG is optional output which may be supressed.
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* This should go where DIAG goes, unless specifically redirected
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* by the operator.
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*
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* TRACE is data collection, statistics etc.
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* In general this goes nowhere unless configured to end up
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* somewhere.
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*
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* About this implementation:
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*
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* This is a very naive implementation spitting things out to stdout/stderr,
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* knowing that we are a single threaded program.
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*
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* XXX: Pull in sbufs to do it right.
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*/
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ntimed_platform.h"
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#include "ntimed.h"
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#ifdef AOS3
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# include "clib/timezone_protos.h"
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# include "inline/timezone.h"
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#endif
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#ifdef AROS
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# include <time.h>
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#endif
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int repeat_trace = 0;
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static FILE *debugfile = NULL;
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static FILE *tracefile = NULL;
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static FILE *
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getdst(enum ocx_chan chan)
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{
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if (chan == OCX_DIAG)
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return (stderr);
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if (chan == OCX_TRACE)
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return (tracefile);
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if (chan == OCX_DEBUG)
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return (debugfile);
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WRONG("Wrong ocx_chan");
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NEEDLESS_RETURN(NULL);
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}
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/**********************************************************************
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* XXX: take strftime format string to chop tracefiles in time.
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*/
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void
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ArgTracefile(const char *fn)
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{
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if (tracefile != NULL && tracefile != stdout) {
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AZ(fclose(tracefile));
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tracefile = NULL;
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}
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if (fn == NULL)
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return;
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tracefile = fopen(fn, "w");
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if (tracefile == NULL)
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Fail(NULL, 1, "Could not open '%s' for writing", fn);
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}
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void
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EnableDebug()
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{
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debugfile = stdout;
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}
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void
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EnableTraceDebug()
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{
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repeat_trace = 1;
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}
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/**********************************************************************
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* XXX: The stuff below is generic and really ought to be in ocx.c on
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* XXX: its own.
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*/
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void
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Put(struct ocx *ocx, enum ocx_chan chan, const char *fmt, ...)
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{
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FILE *dst;
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va_list ap;
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AZ(ocx);
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va_start(ap, fmt);
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dst = getdst(chan);
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if (dst != NULL) {
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(void)vfprintf(dst, fmt, ap);
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fflush(dst);
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}
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// Repeat trace in debug channel
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if (chan == OCX_TRACE && repeat_trace) {
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dst = getdst(OCX_DEBUG);
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if (dst != NULL) {
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(void)vfprintf(dst, fmt, ap);
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fflush(dst);
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}
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}
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va_end(ap);
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}
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void
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PutHex(struct ocx *ocx, enum ocx_chan chan, const void *ptr, ssize_t len)
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{
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const uint8_t *p = ptr;
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const char *s = "";
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AN(ptr);
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assert(len >= 0);
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while(len--) {
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Put(ocx, chan, "%s%x", s, *p++);
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s = " ";
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}
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}
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void
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PutTime(struct ocx *ocx, enum ocx_chan chan, const char *fmt, const struct timestamp *ts)
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{
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#ifdef AMIGA
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FILE *dst;
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struct tm tm;
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static char buf[80];
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if (TimezoneBase) {
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const time_t t = (uint32_t)ts->sec;
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localtime_r((const time_t*)&t, &tm);
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strftime(buf, 80, "%+", &tm);
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dst = getdst(chan);
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if (dst != NULL && dst == stdout) {
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(void)fprintf(dst, fmt, buf);
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fflush(dst);
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}
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}
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#endif
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}
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void
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Fail(struct ocx *ocx, int err, const char *fmt, ...)
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{
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FILE *dst;
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va_list ap;
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if (err)
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err = errno;
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Put(ocx, OCX_DIAG, "Failure: ");
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va_start(ap, fmt);
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dst = getdst(OCX_DIAG);
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if (dst != NULL) {
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(void)vfprintf(dst, fmt, ap);
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fflush(dst);
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}
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va_end(ap);
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Put(ocx, OCX_DIAG, "\n");
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if (err)
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Put(ocx, OCX_DIAG, "errno = %d (%s)\n", err, strerror(err));
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exit(1);
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}
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